linux-kernel - [PATCH 0/4] KVM: MMU: mmu audit code improved

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-ID: <4C78FA00.8090606@cn.fujitsu.com>
Date:	Sat, 28 Aug 2010 19:58:56 +0800
From:	Xiao Guangrong <xiaoguangrong@...fujitsu.com>
To:	Avi Kivity <avi@...hat.com>
CC:	Marcelo Tosatti <mtosatti@...hat.com>,
	LKML <linux-kernel@...r.kernel.org>, KVM <kvm@...r.kernel.org>
Subject: [PATCH 0/4] KVM: MMU: mmu audit code improved

The audit can help us to detect the mmu bugs as early as possible, it's also
can help us to fix them.

It's so useful but the linux distribution is imposable to use it since:

- it need enable it by define "AUDIT" macro and compile it
- the audit code is very high overload, it lets the guest mostly hung

So, this patchset supports to enable/disable it dynamically, it's very low
overhead if disable it, and it lowers the audit frequency to assure the guest
running.

After this patchset, we can enable it by:
mount -t debugfs none debugfs
echo 1 > debugfs/kvm/mmu-debug

disable it by:
echo 0 > debugfs/kvm/mmu-debug

default, the audit is disabled

[PATCH 1/4] KVM: MMU: support disable/enable mmu audit dynamically
[PATCH 2/4] KVM: MMU: improve active sp audit
[PATCH 3/4] KVM: MMU: improve spte audit
[PATCH 4/4] KVM: MMU: lower the aduit frequency
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/